The custom prescription Bi-focal lenses in this section are flat-top 28's. These are lined Bi-Focals with a reading seg that measures 28mm in width. There are options for no-line "blended" bi-focals, and other features during checkout. The seg height is optimized for the particular frame selected and will cover approximately the bottom third of the lens. You are welcome to provide your optimum seg height. If you have this measurement, you can enter it in your order comments.
Please note. Rx orders are custom made and may take up to 1 week to process.
Please refer to: Rx ordering info
Tri-Focal lenses are similar to bifocals, but with an additional segment for intermediate vision above the reading section. The intermediate addition is normally half the reading addition and is particularly useful for people who spend a lot of time using computers.